Determining Land vs Building Value on Foreign Rental Property

Hi,

I purchases a residential rental property in Scotland.  The valuation is only of the land and building combined with no separation.  I also have a insurance valuation as part of the Home Report giving market value.  How do I determine the ratio to use for foreign property? 

 

I've tried extensive googling and examining the Council's assessor website, but that is only for commercial property.

 

Thank you in advance.